Post by DTU-TotalEnergies Excellence Centre of Clean Energy (DTEC)

Celebrating Our Second PhD Graduate from the DTEC Project! We’re incredibly proud to celebrate a major milestone in the DTEC project: The graduation of our second PhD researcher Soheil Pouraltafi-kheljan. His work tackles one of the biggest challenges in the green energy transition — how to keep our future, fully renewable power system stable without the built‑in “inertia” that fossil-fuel power plants used to provide. Traditional power plants had huge spinning generators acting like giant flywheels, naturally keeping the grid steady. But wind and solar don’t come with that physical stability. As we rely more on renewables, the grid becomes more sensitive to sudden changes — something we must solve to reach a fully green, reliable energy system. The PhD project focused on how Hybrid Power Plants — combining wind, solar, and storage — can actively support grid stability. The key innovation? A smarter way to control energy storage so the system reacts quickly and protects expensive components like batteries. The solution pairs two technologies: -Batteries (the marathon runners) – high stamina, but stressed by sudden power spikes. -Super-capacitors (the sprinters) – able to deliver huge bursts of power instantly. The new control algorithms act like a digital “traffic controller”: Super-capacitors respond first during sudden grid dips. Batteries and wind take over smoothly for longer support. Battery stress is reduced, extending lifetime and cutting costs. This brings us a step closer to renewable plants that don’t just generate clean energy — they actively protect the grid. By integrating smart storage directly into wind turbines, we can turn variable renewable energy from a challenge into a strength. This work moves the entire sector closer to a future where clean energy is also rock-solid reliable. A huge congratulations to our new PhD graduate for this important contribution to the green transition! Soheil Pouraltafi-kheljan will continue his important work at DTU Wind and Energy Systems as a Postdoc.